load events from elasticsearch
still not working
implemented event reading from elasticsearch
write events to elasticsearch
added sorting by @timestamp
use EVENTS_MODULE configuration to switch between graphite.events or graphite.elasticsearchevents
pep8: blankline fixes
pep8: operator whitespace and formatting
pep8: fix imports
give a default implementation of the events module

Tests won't launch otherwise.
add a test settings config for the Elasticsearch hosts
start unit testing: test building the Query
factor out building the tags query string
start refactoring tests
refactor tests to test function with less scope
test some more edge cases
remove line at end of file
refactor filter expressions for readability
tests for creating indices
add equals method to compare Events